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bug#27530: patch to cut and copy secondary

From: Robert Pluim
Subject: bug#27530: patch to cut and copy secondary
Date: Tue, 05 Sep 2017 11:32:44 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

Tak Kunihiro <address@hidden> writes:

>>> The function `mouse-exchange-point-and-mark-secondary' exchanges `mark
>>> and point' and secondary.  When there is neither primary nor
>>> secondary, it behaves as `exchange-point-and-mark'.  By doing this, no
>>> revision is necessary for functions that react to region.
>> This description seems to contradict the docstring:
>>> +(defun mouse-exchange-point-and-mark-secondary (&optional arg)
>>> +  "Exchange the point and the mark, and the secondary selection.
>>> +When the mark is active, this exchanges the point and the mark
>>> +then creates the secondary selection from the primary selection.
>>> +When the mark is not active but the secondary selection exists,
>>> +this restores the primary selection from the secondary selection."
>>         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> Could you explain in more detail how this functions? The behaviour
>> seems useful, but I don't understand exactly what it does just from
>> the docstring.
> The function exchanges point and mark.
> When there is region, this also creates secondary.
> When there is secondary, this converts secondary to primary in advance.

OK. So if I've understood correctly, the user can then use C-y to yank
the primary (which was the secondary before)?



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